package guanchazhe;

public class ObserverPatternDemo {

    public static void main(String[] args) {
        //创建被观察者对象
        Subject subject = new Subject();


        //创建观察者对象  传入观察内容
        new HexaObserver(subject);
        new OctalObserver(subject);
        new BinaryObserver(subject);

        System.out.println("First state change: 15");
        subject.setState(15);
        System.out.println("Second state change: 10");
        subject.setState(10);
    }
}
